The report says the hotel is unwilling to turn over videotape of the incident, and thus, the NFL has not seen it and declined comment.

The Dolphins, on the other hand, have "done everything to bury it", according to the report.

From ESPN:

The league knows it cannot police all altercations involving NFL players, though this one happened in public, with witnesses. It still is premature, but Incognito's altercation could be a violation of the NFL's personal conduct policy.

Incognito's reputation for being a dirty player in his first seven NFL seasons has already been a storyline this week. Earlier Wednesday, Texans defensive end Antonio Smith was suspended one regular-season game for swinging his helmet at Incognito in their Saturday preseason matchup. Their feud dates back to when Incognito played for the Rams and Smith played for the Cardinals, both in the NFC West.

From ESPN:

Cardinals players such as Smith and Darnell Dockett were known to dislike Incognito for the way he played. "They HATE each other," one person familiar with the two player's battles texted Tuesday. Smith felt as strongly as he did because he felt Incognito pinched players on the bottom of piles and delivered late hits when players weren't looking.
On Saturday night, a video replay of the incident shows Incognito sticking his hands under Smith's facemask, then shoving the Texans defensive end before Smith ripped off Incognito's helmet and swung it in anger, drawing the one-game suspension that the NFL announced today. Coaches who looked at the film said Incognito did nothing wrong on the play.